It sounds as if you've created a User Account Profile, for logging in to the site and using its features.

To create an IMDb Name Page, that would list credits, display a head shot, display a resume, etc., you'd have to enhance your user account to the paid subscription service, IMDb Pro.

You can, however, also have an IMDb Name Page created by adding your name to the credits of a film or TV (or if anyone adds it...it doesn't have to be you). This is done for free (but it will not display a head shot or resume made by you.